Spark plug



Feb. 13, 1923. 1,444,822

I L. WOLLBRlNCK SPARK PLUG Filed Apr. 24, 1922 In venio r": Laaab W0 5 Mnmq z% 0 M .105 or'na Patented Feb.

UNITED STATES PATENT OFFICE.

LOUIS WOLLBRINCK, OF ST. LOUIS, MISSOURI.

Application filed April 24, 1922.

To all whom it may concern:

that I, LOUIS WoLLBnINcK, a citizen of the United States, res St. Louis, in the State of Missouri,

Be it known ments in Spark hereof.

mg is a specifica and exact descrl the accompanyi SPARK PLUG.

iding at have 1nand useful. Improve- Plugs, of which the 'lollowtion containing a full, clear, ption, reference being had to ng drawing, forming a part My invention consists in the novel construction and arrangement of parts h8I6lI1 after particularly claimed.

described and distinctly The object of my invention is to provide a spark-plug with an lmproved elongated form oi amperage-booster, which Wlll give a spark several times produced by an 0 which witlnn from the casin cleaning or casing stronger than that rdinary spark-plug, and amperagebooster shall be enclosed. and. protected by a detachable part remove d g or base of the plug, for

motor-cylinder.

A further object of my inventi provide an pression.

A further new porcelain substitut or base of the A further improved shall be practically of producing a spark of great engines having the very hi ghe .rries the co removed and clean repairs, without removing said irom the on is to spark-plug which foul-proof, and

capable trength in st com Object is o provide an improved spark-plug in which the mam p ntral electrode) ed, or a ed, while the casing plug remains in the cylinder. ob ect is to provide an improved sparloplug with a separate binding post porcelain, having" a cylindrical metallic casi n2; meta,

usion further obj without Secured thereto by crimping the around the same to take care of ex and contraction, breaking said porcela ect of my invention is to cracking provide an impro ed spark-plug central s carried by, and detachabli:

electrode, that i with th 0 main trode is provided with an setshoulder whic with the inner through the b0 perage-booster.

porcel a! n,

and which elecabutment or up 11 makes an ()ll-tlil'llt Joint end of said porcelain, and prevents Oll trom being: torced u re of the latter, to

pwardly the am- Serial No. 556,166.

And finally, the general object of my invention is to provide an improved sparkplug having the construction and advantages above enumerated, which shall yet be simple and oi low cost.

In the drawings,

l ig. 1 is a side-elevation of my invention.

F 2 is a vertical longitudinal section of the same, taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged fragmentary detail view of the parts composing, the amperagebooster.

Fig. 4 is an enlarged fragmentary detail view of the binding-post porcelain and its metallic casing, illustrating the manner in which the latter is crimped around the p0r celain, and.

F 5 is an enlarged detail view of the inner end of the main porcelain member. and. a portion of the central electrode carried thereby.

The numeral 1 designates the casing or base of the plug, which is made of suitable metal. with a threaded portion 2, for the weltknown purpose of permitting the said casing to be screwed into the combustionchamber of the engine or motor, by applying; a wrench or pliers to the usual hexagonal portion A fixed electrooe 4 projects from the said casing or base 1, upon the interior thereof, and extends radially therein to a point near the axis of said casing, so as to cooperate with the adjacent central detachable electrode 5; both of said electrodes being set to avoid anv projection thereof beyond the inner end of said casing". to avoid accidental bending or breakage, which might occur if either of said electrodes projected free beyond the casing. By my construction, as just described. the spark }')Ol11t5 are thoronghly protectedni the plug, and cannot he accidentally bent or broken by contact with external objects,

The nnnier l 6 designates the main porcelain or inst on, which, provided with a central longitudinal passage 7' through wh ch eXtcnds the central metallic elec- Coolest part of the said electrode, no matter said coolest parts be located at the upper ends of said. parts, or at the lower ends thereof, or at any intermediate coolest point.

Said. s]' arkroducing parts will always get quite hot at certain points, after sparks have jumped between them for a considerable time; and this is true of all other sparkplugs known to me; but by the use of my improved construction, as above described, the sparks are not confined to said hot points, and jump always between the cooler points, as the latter offer much less resistance; thereby preventing missing, and keeping the motor continually at its highest effieiency.

The operation.

advantages of apparent from I claim In a spark-plug, a casing, a main insu. later seated in said casing, a binding-post insulating member having an annulargroove in its outer surface; a gasket in said annulangroove; a metallie-tliii' ble holding said main insulator in position and secured upon said binding-post insulating-member exterior of said gasket, around said annulargroove, and a crimpedannular-shoiilder, on said thimble to compress the gasket in said groove, make a tight yiekling joint between said members, and at the same time securely bind said metallic-thiinble in place.

In testimony whereof. I have signed my name to this specification in presence of two subscribing witnesses.

LOUIS WOLLBRINCK.

WVitnesses:

JOHN C. HIeDoN, HENRY L. HIGDON. 

